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(No Model.) 3l Sheets-Sheet l.' G. S. PUTNAM.

' PUMP.

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LZELD 70766,

Patented Mar. l, 1887.4

(No Model.) A 3 sheets-sheet a. y G. S. PUTNAM.

. PUMP.

No. 358,570. n Patented Mar. 1,1887r (No Model.)

3 Sheets-'Sheet 3. G. S. PUTNAM.

PUMP.

No. 358,570. Patented Mar. 1, 1887,

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GEORGE S. FUTN AM, OF BUFFALO, NEW YORK, ASSIGNOR TO ROBERT C. HICKOK AND EMMA J. PUTNAM, BOTH OF SAME PLACE.

PUMP.

SPECIFICATION forming part of Letters Patent No. 358,570, dated Mlarch l, 1887.

Application filed November 11, 1856. Serial No. 218.566. (No model.)

To all whom it may concern:

Be it known that I, GEORGE S. PUTNAM, a citizen of the United States, residing at ABuffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Pumps, and I do declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make ro and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The object of this invention is to combine a double-acting pump in a single cylinder and without using outside waterways` giving the suction and discharge at the same time; and the invention consists, mainly, in a hollow plunger and the arrangement of valves conzo nected therewith, all as hereinafter fully set forth and claimed.

In the drawings, Figure lis a vertical cross section through the upper part of the pump; Fig. 2, a central vertical cross-section of the pump, broken from the upper and lower sections, and showing the main features of the plunger, Fig. 3, a vertical cross-section ol` lower part of pump, broken from the central part, but showing it in a line cut across oppo- 3o siteto that in Figs. l and 2; Figs. 4, 5, 6, and 7,

details of the disks with their openings, forming part ofthe plunger; Fig. S, a top plan of the stationary disks of Figs. l and 8; and Fig. 9, atop plan of the lower disk of Fig. 8, showingvalve-seats, openings, and glands; Fig. l0,

a vertical cross-section of the whole device.

A represents the cylinder-case in all the iigures, and B B the two heads, made alike and screwed outside on the ends of the cylinder.

O is a hollow tube forming part ofthe plunger, made in two sectionsO, the upper part, screwed into the plunger proper, D, above, and C', the lower part, screwed into the lower part of plunger D, as shown in Fig. 2. The

lower part of the hollow plunger C works into a hollow pipe (not shown) that leads into the well, which will be screwed to the lower head, B', and the same arrangement will be made above in head B, and a plunger-rod will be 5o screwed to the top of plunger-tube C.

In Fig. l two disks are shown in central cross-section in position, secured in and on top of' the cylinder A. The upper one, E, (shown in plan, Fig. 8.) has two oval open ings, a c, for the play of the valves b b, which are formed in or are a part of the leather disk or packing e, which is set between the upper disk, E, and lower disk, F, the latter having raised rims thereon, forming valve-seats and openings a c, corresponding to those above, 5o into the cylinder A below, forming waterways.

g g, Figs. l, 3, and 9, show the downwardlyprojecting loose gland o set in lowerdisk F and surrounding the hollow plunger O C', having a 65 series of annular depressions or longitudinal rings, i' r r, for holding water therein, making a water packing. This gland has ears i i, as shown in Figs. 3 and 9, and dotted lines, Fig. 8,)vl1ieh set loosely in seats 71 lz, formed in and 70 on the lower disk F, having an interposed rubber packing, 7c, between, as shown in Fig. 3, hutleaving a vertical space,c,between theinner vertical edge of the seats h and gland g, and a vertical space, d, between the upper part of the socket and edge of cars i These small spaces c and d are to allow for clearance between the outside ol' plunger O C and the disk which holds the glands, and is important in connection with the fitting of said glands 1n SO the seats in the under disk F, for the purpose of getting a perl'ect self-centering ofthe plunger, when, in consequence of the wear of the leathers j j', forming the cup between the sides of the cylinder A and plunger D, the plunger works unevenly, as will be the case. The loose gland g, moving or rocking with the plunger C O', overcomes this by the slight lateral motion allowed by the spaces c d, and makes the plunger work with a perfect vertical action. 9o This prevents the pump cramping.

The foregoing description of disks E F, leather packing, valves, glands, seats, Src., applies equally to those in the lower part of the cylinder, being precisely the same in construction and working. These disks are kept rigidly in place as follows: As shown in Fig. 3, the upper disk E has cast on the under side a dowel, p, which projects through disk F below. The two disks are set inside the lower loo head, B, on a rib or bead, s; then the cylinder A is screwed into the head and down on the top disk E, pressing the disks firmly together and keeping them in place in the pump, the dowels p p preventing any lateral sliding out of place. In the upper head, B, the disks are rst set on top of the cylinder A, and the head B is screwed therein, bringing rib s tightly against the disks.

rIhe plunger proper, D, is constructed in three parts or disks, the top disk, l, having the hollow plunger C screwed thereto in the center in a raised rim, t, and which curves from the center to the side, as shown in Fig. 2, and giving a passage, m, downward through a leather packing, j, (interposed between parts l and 2 and up around the side of disk I, forming a cup-packing). Out of this leather ring or packing the valve Z is wholly or partly formed, and which opens and closes the waterpassage m, leading above into the hollow plunger and down through disks 2 and 3 into the cylinder A. Another opening is made inv the disk opposite that just described, also in ring j, giving a water-passage, n, into the cylinder A, all around the hollow plunger C, and continuing down, through disks l 2 3, into the hollow plunger C. (See Fig. 7 for bottom view ofdisk l and its openings.) Next below the leather valve ring Zj is disk 2, having a raised valve-seat in connection with valve Z and water-way m,- and opposite is the opening for water-way n and working of `valve Z, made of the leather packingring j', said valve rising and falling in said opening and closing on a raised seat on disk, 3, below. rlhe packing-ringj alsois formed into a cup outside of disk 3, between it and cylinder A. See Figs. 5 and 6 for plan of top and bottom and openings in disk 2.)

Disk 3 has a water-way, in, in connection with those in disks l and 2, and another, n, in .connection with those above, as described, and which curves to the center and there receives hollow plunger C', which lis screwed therein, as shown. The course of the water is shown by arrows. These sections or disks l 2 3 are firmly bolted together, the hollow plunger screwed thereto, as described, and, in connection with the valves and openings m n', give the double action in a single cylinder.

If desired,'ballvalves may be used instead of flap-valves, and which may be done by merely changing the construction of the seats.

rIhe operation of the pump is as follows: When the plunger is forced down,it opens the valves Z Z in the plunger proper, D, as in Fig. 2. The valves in the upper disks E F are held closed by the volume of water above and vacuum below the Valves in main cylinder A, and the valves in the lower disks E F are also kept closed by the pressure of the water below the plunger proper, D. The water now rushes up through the lower part of the hollow plunger C and through openings n and valve Z/ in plunger proper, D, and lls the space above plunger D and around hollow plunger C, below the valves in disksE F above. Meanwhile the pressure of the water inthe cylinder below the plunger proper, D, opens the valve Zin said plunger, which allows the water to rush up through hollow plunger G and exit at the top, as is usual. The upward stroke of the plunger closes the two valvesZ Z' and opens valves b ein the top disks E F and also in the corresponding bottom disks. The upper valves are opened by the water in the space around the plunger C, being forced up by the upward' action of the plunger proper. The lower valves are opened upward by the vacuum formed ,in the cylinder by the plunger proper rising therein.

The whole device is perfectly simple and effective, giving force, volume, and steady action throughout, and by the simple up and down stroke two suctions and two discharges are obtained-a result never before accomplished in a single-cylinder pump,so far asIam acquainted. 'This is owing mainly to the employment of a hollow plunger, which is the great feature in this pump.

It is obvious that by removing the valves Z Z in the plunger proper, D, and putting a valve in the top of hollow plunger G and another in the bottom of said plunger C', the same effect could be attained; but at present I prefer the y IOC cylinder A above plunger D, the interposed leather packing-rings and valves Z Z', constructed in connection therewith, and the upper and lower disks, E F, having interposed leather packing-rings e and valves b b, wateropenings a a, and glands g Z in seats h h in the lower part of disks F, all constructed, ar-v ranged, and operating substantially as set forth.

2. In a single-cylinder double-acting pump, the combination,with the hollow plunger G O', of the disks E F,situated above and below the plunger proper, D, as described, and having the loose glands g g, with ears ji t' setting in sockets h h, with interposed rubber packing 7c 7c, and the centering and clearance spaces c d between the glands and lower disk F, all substantially as and for the purpose specified.

In testimony whereof I aftix my signature in presence of two witnesses.

GEORGE S. PUTNAM.

Witnesses:

J. R. BRAKE, GEO. A. BURNETT.

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